1: Naming of HDMI or DisplayPort devices connected to the graphics card changed and no longer is suffixed with a different number.2: In VoiceMeeter, I now am only able to select *one* of my monitors as a Hardware Out. Attempting to specify the second one has no effect and does not change the hardware out at all.

So, now I can only route audio to one monitor, whereas before I was able to interact with each monitor independently. This is what I currently see in VoiceMeeter Banana:

The second device named "C27F591" cannot be selected *at all*.

For reference, this is the Playback Options menu and what it lists:

Note the two C27F591 devices - only one is being locked by VoiceMeeter, ever. Prior to the Nvidia update, one of these was typically named C27F591-0, and the other named C27F591-4 or C27F591-8.

It's been a couple of months, so maybe you alredy got it solved, but anyway...

Have you tried to rename one of the outputs? I had to do it once, when a speech recognition program refused to use my microphone, because the input was named "Line". It just didn't show the input in the list of what it had recognized as valid inputs. When I renamed the input to "Microphone" the input immediately showed up in the list. The program was definitely looking for names that indicated microphones.

I have four NVIDIA outputs with the same name - "NVIDIA Output":

four_like_before.jpg (25.9 KiB) Viewed 2067 times

In the "General" tab, you can give it a new name.The box with the name is an editable field: